Rune, you're the king of loopiness :)
BTW, I think you'll like this experiment, where they "filled in" the empty
space that appears in one of Escher's drawings.
http://escherdroste.math.leidenuniv.nl/
http://escherdroste.math.leidenuniv.nl/clips/clip_1_1.mpg
I'm sure you'll like it.
Fernando